curl --request GET \
  --url https://api.fourthwall.com/open-api/v1.0/products/{productId}/inventory \
  --header 'Authorization: Bearer <token>'

{
  "results": [
    {
      "variantId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "quantity": 123,
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "total": 123,
  "page": 123,
  "size": 123,
  "totalPages": 123
}